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[linux-2.6-omap-h63xx.git] / drivers / pnp / quirks.c
1 /*
2  *  This file contains quirk handling code for PnP devices
3  *  Some devices do not report all their resources, and need to have extra
4  *  resources added. This is most easily accomplished at initialisation time
5  *  when building up the resource structure for the first time.
6  *
7  *  Copyright (c) 2000 Peter Denison <peterd@pnd-pc.demon.co.uk>
8  *
9  *  Heavily based on PCI quirks handling which is
10  *
11  *  Copyright (c) 1999 Martin Mares <mj@ucw.cz>
12  */
13
14 #include <linux/types.h>
15 #include <linux/kernel.h>
16 #include <linux/string.h>
17 #include <linux/slab.h>
18 #include <linux/pnp.h>
19 #include <linux/io.h>
20 #include <linux/kallsyms.h>
21 #include "base.h"
22
23 static void quirk_awe32_resources(struct pnp_dev *dev)
24 {
25         struct pnp_port *port, *port2, *port3;
26         struct pnp_option *res = dev->dependent;
27
28         /*
29          * Unfortunately the isapnp_add_port_resource is too tightly bound
30          * into the PnP discovery sequence, and cannot be used. Link in the
31          * two extra ports (at offset 0x400 and 0x800 from the one given) by
32          * hand.
33          */
34         for (; res; res = res->next) {
35                 port2 = pnp_alloc(sizeof(struct pnp_port));
36                 if (!port2)
37                         return;
38                 port3 = pnp_alloc(sizeof(struct pnp_port));
39                 if (!port3) {
40                         kfree(port2);
41                         return;
42                 }
43                 port = res->port;
44                 memcpy(port2, port, sizeof(struct pnp_port));
45                 memcpy(port3, port, sizeof(struct pnp_port));
46                 port->next = port2;
47                 port2->next = port3;
48                 port2->min += 0x400;
49                 port2->max += 0x400;
50                 port3->min += 0x800;
51                 port3->max += 0x800;
52                 dev_info(&dev->dev,
53                         "AWE32 quirk - added ioports 0x%lx and 0x%lx\n",
54                         (unsigned long)port2->min,
55                         (unsigned long)port3->min);
56         }
57 }
58
59 static void quirk_cmi8330_resources(struct pnp_dev *dev)
60 {
61         struct pnp_option *res = dev->dependent;
62         unsigned long tmp;
63
64         for (; res; res = res->next) {
65
66                 struct pnp_irq *irq;
67                 struct pnp_dma *dma;
68
69                 for (irq = res->irq; irq; irq = irq->next) {    // Valid irqs are 5, 7, 10
70                         tmp = 0x04A0;
71                         bitmap_copy(irq->map, &tmp, 16);        // 0000 0100 1010 0000
72                 }
73
74                 for (dma = res->dma; dma; dma = dma->next)      // Valid 8bit dma channels are 1,3
75                         if ((dma->flags & IORESOURCE_DMA_TYPE_MASK) ==
76                             IORESOURCE_DMA_8BIT)
77                                 dma->map = 0x000A;
78         }
79         dev_info(&dev->dev, "CMI8330 quirk - forced possible IRQs to 5, 7, 10 "
80                 "and DMA channels to 1, 3\n");
81 }
82
83 static void quirk_sb16audio_resources(struct pnp_dev *dev)
84 {
85         struct pnp_port *port;
86         struct pnp_option *res = dev->dependent;
87         int changed = 0;
88
89         /*
90          * The default range on the mpu port for these devices is 0x388-0x388.
91          * Here we increase that range so that two such cards can be
92          * auto-configured.
93          */
94
95         for (; res; res = res->next) {
96                 port = res->port;
97                 if (!port)
98                         continue;
99                 port = port->next;
100                 if (!port)
101                         continue;
102                 port = port->next;
103                 if (!port)
104                         continue;
105                 if (port->min != port->max)
106                         continue;
107                 port->max += 0x70;
108                 changed = 1;
109         }
110         if (changed)
111                 dev_info(&dev->dev, "SB audio device quirk - increased port range\n");
112 }
113
114 static struct pnp_option *quirk_isapnp_mpu_options(struct pnp_dev *dev)
115 {
116         struct pnp_option *head = NULL;
117         struct pnp_option *prev = NULL;
118         struct pnp_option *res;
119
120         /*
121          * Build a functional IRQ-less variant of each MPU option.
122          */
123
124         for (res = dev->dependent; res; res = res->next) {
125                 struct pnp_option *curr;
126                 struct pnp_port *port;
127                 struct pnp_port *copy;
128
129                 port = res->port;
130                 if (!port || !res->irq)
131                         continue;
132
133                 copy = pnp_alloc(sizeof *copy);
134                 if (!copy)
135                         break;
136
137                 copy->min = port->min;
138                 copy->max = port->max;
139                 copy->align = port->align;
140                 copy->size = port->size;
141                 copy->flags = port->flags;
142
143                 curr = pnp_build_option(PNP_RES_PRIORITY_FUNCTIONAL);
144                 if (!curr) {
145                         kfree(copy);
146                         break;
147                 }
148                 curr->port = copy;
149
150                 if (prev)
151                         prev->next = curr;
152                 else
153                         head = curr;
154                 prev = curr;
155         }
156         if (head)
157                 dev_info(&dev->dev, "adding IRQ-less MPU options\n");
158
159         return head;
160 }
161
162 static void quirk_ad1815_mpu_resources(struct pnp_dev *dev)
163 {
164         struct pnp_option *res;
165         struct pnp_irq *irq;
166
167         /*
168          * Distribute the independent IRQ over the dependent options
169          */
170
171         res = dev->independent;
172         if (!res)
173                 return;
174
175         irq = res->irq;
176         if (!irq || irq->next)
177                 return;
178
179         res = dev->dependent;
180         if (!res)
181                 return;
182
183         while (1) {
184                 struct pnp_irq *copy;
185
186                 copy = pnp_alloc(sizeof *copy);
187                 if (!copy)
188                         break;
189
190                 memcpy(copy->map, irq->map, sizeof copy->map);
191                 copy->flags = irq->flags;
192
193                 copy->next = res->irq; /* Yes, this is NULL */
194                 res->irq = copy;
195
196                 if (!res->next)
197                         break;
198                 res = res->next;
199         }
200         kfree(irq);
201
202         res->next = quirk_isapnp_mpu_options(dev);
203
204         res = dev->independent;
205         res->irq = NULL;
206 }
207
208 static void quirk_isapnp_mpu_resources(struct pnp_dev *dev)
209 {
210         struct pnp_option *res;
211
212         res = dev->dependent;
213         if (!res)
214                 return;
215
216         while (res->next)
217                 res = res->next;
218
219         res->next = quirk_isapnp_mpu_options(dev);
220 }
221
222 #include <linux/pci.h>
223
224 static void quirk_system_pci_resources(struct pnp_dev *dev)
225 {
226         struct pci_dev *pdev = NULL;
227         struct resource *res;
228         resource_size_t pnp_start, pnp_end, pci_start, pci_end;
229         int i, j;
230
231         /*
232          * Some BIOSes have PNP motherboard devices with resources that
233          * partially overlap PCI BARs.  The PNP system driver claims these
234          * motherboard resources, which prevents the normal PCI driver from
235          * requesting them later.
236          *
237          * This patch disables the PNP resources that conflict with PCI BARs
238          * so they won't be claimed by the PNP system driver.
239          */
240         for_each_pci_dev(pdev) {
241                 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
242                         if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM) ||
243                             pci_resource_len(pdev, i) == 0)
244                                 continue;
245
246                         pci_start = pci_resource_start(pdev, i);
247                         pci_end = pci_resource_end(pdev, i);
248                         for (j = 0;
249                              (res = pnp_get_resource(dev, IORESOURCE_MEM, j));
250                              j++) {
251                                 if (res->flags & IORESOURCE_UNSET ||
252                                     (res->start == 0 && res->end == 0))
253                                         continue;
254
255                                 pnp_start = res->start;
256                                 pnp_end = res->end;
257
258                                 /*
259                                  * If the PNP region doesn't overlap the PCI
260                                  * region at all, there's no problem.
261                                  */
262                                 if (pnp_end < pci_start || pnp_start > pci_end)
263                                         continue;
264
265                                 /*
266                                  * If the PNP region completely encloses (or is
267                                  * at least as large as) the PCI region, that's
268                                  * also OK.  For example, this happens when the
269                                  * PNP device describes a bridge with PCI
270                                  * behind it.
271                                  */
272                                 if (pnp_start <= pci_start &&
273                                     pnp_end >= pci_end)
274                                         continue;
275
276                                 /*
277                                  * Otherwise, the PNP region overlaps *part* of
278                                  * the PCI region, and that might prevent a PCI
279                                  * driver from requesting its resources.
280                                  */
281                                 dev_warn(&dev->dev, "mem resource "
282                                         "(0x%llx-0x%llx) overlaps %s BAR %d "
283                                         "(0x%llx-0x%llx), disabling\n",
284                                         (unsigned long long) pnp_start,
285                                         (unsigned long long) pnp_end,
286                                         pci_name(pdev), i,
287                                         (unsigned long long) pci_start,
288                                         (unsigned long long) pci_end);
289                                 res->flags |= IORESOURCE_DISABLED;
290                         }
291                 }
292         }
293 }
294
295 /*
296  *  PnP Quirks
297  *  Cards or devices that need some tweaking due to incomplete resource info
298  */
299
300 static struct pnp_fixup pnp_fixups[] = {
301         /* Soundblaster awe io port quirk */
302         {"CTL0021", quirk_awe32_resources},
303         {"CTL0022", quirk_awe32_resources},
304         {"CTL0023", quirk_awe32_resources},
305         /* CMI 8330 interrupt and dma fix */
306         {"@X@0001", quirk_cmi8330_resources},
307         /* Soundblaster audio device io port range quirk */
308         {"CTL0001", quirk_sb16audio_resources},
309         {"CTL0031", quirk_sb16audio_resources},
310         {"CTL0041", quirk_sb16audio_resources},
311         {"CTL0042", quirk_sb16audio_resources},
312         {"CTL0043", quirk_sb16audio_resources},
313         {"CTL0044", quirk_sb16audio_resources},
314         {"CTL0045", quirk_sb16audio_resources},
315         /* Add IRQ-less MPU options */
316         {"ADS7151", quirk_ad1815_mpu_resources},
317         {"ADS7181", quirk_isapnp_mpu_resources},
318         {"AZT0002", quirk_isapnp_mpu_resources},
319         /* PnP resources that might overlap PCI BARs */
320         {"PNP0c01", quirk_system_pci_resources},
321         {"PNP0c02", quirk_system_pci_resources},
322         {""}
323 };
324
325 void pnp_fixup_device(struct pnp_dev *dev)
326 {
327         struct pnp_fixup *f;
328
329         for (f = pnp_fixups; *f->id; f++) {
330                 if (!compare_pnp_id(dev->id, f->id))
331                         continue;
332 #ifdef DEBUG
333                 dev_dbg(&dev->dev, "%s: calling ", f->id);
334                 print_fn_descriptor_symbol("%s\n", f->quirk_function);
335 #endif
336                 f->quirk_function(dev);
337         }
338 }